My dealer is reasonably okay with my car.
The guys in back all come and look at the supercharger and I tell them to leave the brakes alone when I am in for free maintenance.
Last time, when I picked up my car they told me they wanted to do something for me on the brakes so they flushed them for me.
I thanked them but inwardly I was thinking, gee, I just put new high temp fluid in so I will have to do that again when I get home. They were trying to be helpful, so next time I will have to mention to not do that either.
2011 e92 M3 Monte Carlo Blue ESS 535
2015 cayman GTS
2006 SLK 55 AMG